Abstract: The invention relates to a new battery element (10), in which a thermal conduction element in the form of a multi-chamber hollow profiled element (20) having chambers (21) is integrated in addition to a battery cell. The heat transfer is optimal, because the temperature-controlled multi-chamber hollow profiled element (20) is in planar contact with the battery cell. The electrodes (31) of the battery element (10) are surrounded by an outer electrical insulation, which is formed solely by an outer film (40, 40) or by said film (40, 40?) and a thermoplastic plastic coating (27) of the multi-chamber hollow profiled element (20).

Abstract: The invention relates to a solder powder for connecting components made of aluminium or aluminium alloys by brazing, in particular a brazing powder for connecting heat exchanger components. The solder powder consists of powder particles on an aluminium-silicon base having a weight fraction of more than 12% by weight of silicon, wherein the powder particles have been produced by a rapid solidification and contain uniformly distributed silicon primary crystal precipitations in the eutectic aluminium-silicon alloy structure. Coating with such a solder powder leads to a uniform distribution of the silicon on the surface of the component coated with solder powder and thus to the same good soldering results.